... Crystals Powde Sodium Hexametaphosphate,SHMP 68% (Tech Grade) Synonyms: Hexasodium metaphosphate, Graham's salt, Glassy sodium, Sodium Tetrapolyphosphate, hexametaphosphate sodium salt, ... 21Fineness (mesh) 60~80 Example of Use: Used in industries of oil fields, paper-making, textile, dyeing ... requirement It must be stored in places well ventilated and dry. Sodium Hexametaphosphate,SHMP 68% (Tech Grade)